An engineer investigated how the current through a newly designed tungsten micro-heating element varied with the potential difference applied across it.
Write down the equation which links current (III), potential difference (VVV), and resistance (RRR).
Use the graph below to determine the resistance of the micro-heating element when the potential difference across it is 6.0 V6.0\text{ V}6.0 V.
The digital multimeter used to measure the potential difference had a zero error. Explain what is meant by a zero error.
Current, potential difference and resistance Questions
Practise AQA GCSE Physics Current, potential difference and resistance with exam-style questions for Foundation and Higher tier. 82 questions covering Standard circuit diagram symbols, Electrical charge and current, Current, resistance and potential difference, and Resistors, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.